Samsung i780 Service Manual - Page 50
PHONE ON, Check UME200, & Neighboring, Circuit, Check U302 &, Neighboring, Circuits, Chcek
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z PHONE Part Flow Chart of Troubleshooting PHONE ON NG 1PIN in U301 HIGH? YES Check UME200 & Neighboring Circuit NO 1pin in YES Check U204 U204 LOW? NO 6pin in U204 LOW? YES NO Output PWR In U302 OK? Check 6 pin YES Q302 Check U302 & Neighboring Circuits Chcek UCP700 & TCX100 Neighboring 9-3 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-3
This Document can not be used without Samsung's authorization
PHONE Part
NG
YES
NO
YES
NO
YES
NO
YES
1PIN in
U301 HIGH?
PHONE ON
Output
PWR
In U302 OK?
1pin in
U204 LOW?
6pin in
U204 LOW?
Check UME200
& Neighboring
Circuit
Check U302 &
Neighboring
Circuits
Chcek UCP700
& TCX100
Neighboring
Check 6 pin
Q302
Check U204